83 (the 23rd prime)

 
Next prime89
Previous prime79
Octal(123)8
Hexadecimal(53)16
Prime gap6
15th Sexy prime (the small number)The big number is 89 .
13th Prime of the Form 4n+3 
7th Euler prime number 
9th Sophie Germain prime 
7th Safe prime 
14th Left-truncatable prime